Registration dates for the 129th Boston Marathon announced

The Boston Athletic Association (B.A.A.) announced Monday that registration for the 129th Boston Marathon will take place over five days, from Sept. 9–13 at www.baa.org

The field size for the 129th Boston Marathon, to be run on Monday, April 21, 2025, will be 30,000 participants.

Qualifier registration will open on Sept. 9 at 10 a.m. and will close on Sept. 13, at 5 p.m. Any athlete who has achieved a currently valid Boston Marathon qualifying time may submit a registration application during registration week.

Applications will be accepted until 5 p.m. on Sept. 13. The 2025 Boston Marathon qualifying window began on Sept. 1, 2023, and will close at 5 p.m. on Friday, Sept. 13. If space is still available after the conclusion of registration week, registration will re-open on Sept. 16.

Qualifying standards across all divisions will remain the same as they were for the 2024 Boston Marathon.

posted Tuesday June 4th
by Andrew Clark